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Ch.12 - The Lymphatic System and Body Defenses
Across
1. Process during which a B cell or T cell becomes sensitized through binding contact with an antigen.
4. A protein molecule, released by plasma cells, that mediates humoral immunity; an antibody.
6. Immunity produced by an encounter with an antigen; provides immunologic memory.
7. Type of T lymphocyte that orchestrates cellular immunity by direct contact with other immune cells and by releasing chemicals called lymphokines
10. Short-lived immunity resulting from the introduction of "borrowed antibodies" obtained from an immune animal or human donor; immunological memory is not established.
11. Clumping of (foreign) cells; induced by cross-linking of antigen-antibody complexes.
12. An agent or chemical substance that induces fever.
13. Immunity conferred by antibodies present in blood plasma and other body fluids.
Down
1. A group of blood-borne proteins, which, when activated, enhance the inflammatory and immune responses and may lead to cell lysis.
2. Ability of the body's immune cells to recognize (by binding) specific antigens; reflects the presence of plasma membrane-bound receptors.
3. A nonspecific defensive response of the body to tissue injury; includes dilation of blood vessels and an increase in vessel permeability; indicated by redness, heat, swelling, and pain.
5. Proteins involved in cell-mediated immune responses that enhance immune and inflammatory responses.
6. A substance or part of a substance (living or nonliving) that is recognized as foreign by the immune system, activates the immune system, and reacts with immune cells or their products.
8. Endocrine gland active in immune response.
9. Small lymphatic organ that filters lymph; contains macrophages and lymphocytes.